<!DOCTYPE html>
<html>
    <head>
        <script src="vue.js"></script>
    </head>
    <body>
        <div id="app">
            <input type="text" v-model="msg">
        </div>
        <script>
            var vm = new Vue({
                el:'#app',
                data: {
                    msg: 'v-model'
                }
            });
        </script>
    </body>
</html>